Improvement in steam-generators



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HENRY A. V.`POST, OF CINCINNATI, OHIO, ASSIGrNOR TO HIMSELF, JAMES H. SHELDON, AND JAMES T. STERLING.

Letters Patent No. 100,443, dated llfafchvl, 1870.

IMPROVEMENT IN STEAM-GENERATORS.

The Schedule referred' to in these Letters Patent and making part of the salme.

To all whom it may camera- Be it known that I, HENRY-A. V. P0sT,-of Cincinnati, in the county of Hamilton, `and State of Ohio, have invented certain Improvements in Steam-Generators; and I do' hereby declare that the following is a full, clear, and exact description thereof, reference being 'had to the annexed drawings making part of thisspecification, in whicht Figure l isa'plan view of the heating-pipes, showing their arrangement within the furnace.

Figure 2.is a side elevation, showing the pipes. in position, thegeuerator to` which they are attached, together with the manner in which they are attached, andthe direction which the heated gases take in pass- 'ing from the furnace to the atmosphere.

Figure 3 is an end view of the. parts above alluded Corresponding letters refer to corresponding parts in the' several figures.

This invention relates to steam-generators; and It consists in the construction, combination, and arrangement of 'the parts, as will be lnor'e fully described hereinafter.

A1t is a well-known fact that 'an active' circulation of the water contained `in a steamye'nerator greatly facilitates the generation of steam, and if suclh circulation is properly produced, it also results in increased economy of fuel. It is also believed to be a fact that a greater economy results from the fuel burned, when the `water to which its heat is to b e impaltcd, or by which it is to be absorbed, isdivided into small volumes, than when such` heat is expended upon large bodies of water.

It heilig well known that water is a slow conductor y of heat, it follows that its position with reference to the surtacesfrom which it derivesits heat should be changed as rapidly as possible, in order that the particles which have already been heated to or nearly to the evaporating point, maygive place to other particles of a .lower temperature, in order that the heat transmitted through the metal may be taken up as fast as thus transmitted and carriedto other portions of the generator', to be converted into steam by `the `addition of more heat, should it be required.

My object is toploduce a generator which shall effect the results above indicated, by fulliling the condiwith iluesor tubes, forthe passage of the heated products of combustion, after they have. passed from the heating-pipes.

B refers to a furnace, which may be of the form shown, or of any other suitableconstruction, it being supplied with gratos, upon which the fuel to beburned is placed, its upper surface consisting of an arch or di-A aphragm, B', the object of which is to confine. the heat and keep it in contact with the heating-pipes, and to a certain citent reflect its heat upon such pipes, it being entirely different in this respect from those furnaces which are provided with perforated Aarches for the purposeof allowing the products of combustion to pass through into-a coinbust`ion-chamber.

C refers to the flue, 'through which the products ofY combustion pass from the furnace to the atniosphere, its course being indicated by the arrows in fig. 2.

DD refer to heating-pipes, which receive their snpply of water from the lower portion of the generator, and at a. point near its rear end, the object being to take itl from the point where the water is cooler than at any other point. These pipes may be arranged as shown in the drawings, so that the water shall be taken from "the generator at two points, and be conducted through any desired length of pipe to a common vertical pipe, which conducts both streams or jets to the generator. e

D' refers to the vertical pipe above referred to, it bein-g united to the horizontal pipes in the. manner shown in Iig. 2, or. in any other convenient manner. This pipe receives the waterfrom both branches ofthe horizontal pipcs,it which it has been made to pass for-` ward ard backward in the furnace, and in. close proximity to the burning fuel, .until it has becolne highly heated, and delivers it throngh'thc elbow E to the steam-generator,at a point above the level of the water in such generator. 4

F F refer to-'the pipes which connect the heatingpipes D D with the generator, their arrangements for that purpose heilig clearly shown in tig. 3.

The operation of this device is as follows:

`The generator havingbeen filled with water to the proper height, it ows into and tills thel heating-pipes, after which a tire is kindled, which ysoon vheats the water in these pipes to an extent sutlcient to canse it to flow up through the vertical pipe D' into the Vupper portionrof the generator, and the cold water flows in through the branch-pipes F F, tosupply the place of delivered to the upper portion of the generator, so that"` the steam which rises therefrom is not condensed or cooled to any extent by coming in contact with the cooler water in the generator.

Atter all the heat has been absorbed by the heatn gng-pipes, which are capable of taking up in the time allowed, the heated products of combustion pass on to the rear of the generator, and up through a vertical tiue to and along the horizontal tine underneath such generator to the ti'ont end thereof', whence they are conducted to the fines or tubes which pass through such generator, and then ont into a vertical flue, which delivers them into the atmosphere, thus, as will be seen, aiding in the production of steam wit-hin the generator.

'lhe furnace is separated from the generator by a partition or an arch, which may be of any suit-able ma# terial, the object being to confine the heat as much as possible to the heating-pipes, in order that the difference in temperature between them and the water in the generator may be as great as possible, so as to make the movement of the water through the pipes as rapid as it can well be.

One great advantage indirectly growing out ot' this improvement is the prevention 4of the deposition of scale upon the interior of the generator, as the rapid motion of the water will not permit it to remain in a. state of rest for a sufficient length of time to permit such deposition to be made.

The generator is to be supplied with the usual apparatus for supplying it with water, and the usual blow-ofi` cock for discharging the water therefrom.

Having thus described my invention,

What I claim, and desire to secure by Letters Pattent, is

1. Arranging the heating-pipes in a furnace or fine, which is separated from the generator by means of an arch or a partition, substantiallyas and fr the purpose speciiied.

2. lhe combination 'and arrangement of the generator A, heating-pipes D D, and dividing-arch or par tition C', substantially as and for the purpose specified.

In testimony of which invention, I hereunto set my hand.

HENRY A. V. POST.

Witnesses:

EsocH B. TRUMBULL, J OHN T. CAssILLY.

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